import 'package:flutter/material.dart';


void main(){
  runApp(MyApp());
}
class MyApp extends StatelessWidget {
  const MyApp({Key key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title:Text('demo')),
        body: GestureDetector(
          child: Text('点击'),
        ),
      ),
    );
  }
}
